A reliable tool to determine the proof of ethyl alcohol spiritsThe Bel-Art Products hydrometer has the triple accreditation of ISO/IEC 17025:2005, A2LA to ensure accurate results. This instrument is serialized to help you read the levels of ethyl alcohol spirits. The 12-inch hydrometer features a metal ballast that offers an environmentally friendly tool for testing. You can get a multi-language statement of accuracy with this hydrometer. The temperature of standardization of this hydrometer is 60 degrees Fahrenheit.